$(document).ready(function(){
    let url = $('#url').text();
    setTimeout(`$('#countdown').html('1 秒后自动跳转至 ${url}');`, 1000);
    setTimeout(`$('#countdown').html('0 秒后自动跳转至 ${url}');`, 2000);
    setTimeout(`window.location.href = '${url}'`, 2000);
});